Question

The pH value of 10-7 M solution HCl is
(1) Equal to 1
(2) Equal to 2
(3) Less than 7
(4) Equal to o​

Answer 1

Answer:

H +] from HCl=10 −7 M

[H + ] from H2O=10 −7M

Total [H +]=2×10 −7M

pH=−log[H + ]

=−log(2×10 −7 )

=7−log

so the value is less than 7